I just got a used shell mill mounted on a R8 arbor. The cutter is made by Morse, is 1-1/8 inches in diameter, and has ten spiral teeth. It has no trouble whatsoever with aluminum. I was taking nearly full-width passes, 0.015" or so deep. Didn't even slow down while I squared up a block.
Steel will be another matter.
Typo. It's 2-1/8 inch in diameter.
I used to run a 3" 4fl indexable facemill at 0.150" DOC, full diameter, max spindle RPM in aluminum. Feed too hard and you can hear the machine bog. 0.015" should be trivial for any full-size knee mill.
Regards,
Robin
PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.